<template>
    <div class="tabs">
        <el-tag
            v-for="(item,index) in tags"
            :key="item.path"
            :closable="item.name !=='home'"
            :effect="$route.name === item.name ? 'dark' :'plain' "
            @click="changeMenu(item)"
            @close="handleClose(item,index)"
            size="small"
            >
            {{ item.label }}
        </el-tag>
    </div>
</template>

<script>
import {mapState,mapMutations} from 'vuex'
export default {
    name:'CommonTag',
    data(){
        return {}
    },
    computed:{
        ...mapState({
            tags:state => state.tab.tabsList
        })
    },
    methods:{
        ...mapMutations(['closeTag']),
        //点击tag跳转的功能
        changeMenu(item) {
            this.$router.push({name:item.name})
        },
        // 点击tag删除的功能
        handleClose(item,index){
            //调用store中的mapMutation
            this.closeTag(item)
            const length = this.tags.length 
            //删除之后的跳转逻辑
            if(item.name!==this.$route.name){
                return 
            }
            //表示的是删除的最后一项
            if (index === length){
                this.$router.push({
                    name:this.tags[index-1].name
                })
            }else {
                this.$router.push({
                    name:this.tags[index].name
                })
            }
        }
    }
    
}
</script>

<style lang="less" scoped>
    .tabs {
        padding: 18px;
        .el-tag {
            margin-right: 15px;
            cursor: pointer;
        }
    }
</style>